CN203672157U - Flue gas treatment system of rotary hearth furnace - Google Patents
Flue gas treatment system of rotary hearth furnace Download PDFInfo
- Publication number
- CN203672157U CN203672157U CN201320852652.9U CN201320852652U CN203672157U CN 203672157 U CN203672157 U CN 203672157U CN 201320852652 U CN201320852652 U CN 201320852652U CN 203672157 U CN203672157 U CN 203672157U
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- China
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- flue gas
- rotary hearth
- hearth furnace
- membrane wall
- air
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model relates to a flue gas treatment system of a rotary hearth furnace. The flue gas treatment system of the rotary hearth furnace comprises a settling chamber, a membrane wall, a waste heat boiler and a bag-type dust remover, wherein the settling chamber, the membrane wall, the waste heat boiler and the bag-type dust remover are sequentially connected through flue gas pipelines, a flue gas inlet of the settling chamber is connected with a flue gas outlet of the rotary hearth furnace, and flue gas produced by the rotary hearth furnace passes through the settling chamber, the membrane wall, the waste heat boiler and the bag-type dust remover sequentially through the flue gas pipelines and is then exhausted through a flue gas exhaust port in the bag-type dust remover. The flue gas treatment system of the rotary hearth furnace is arranged on a rotary hearth furnace flue gas system and can well recycle zinc and other alkali metal components in the flue gas. Particularly, because the flue gas exhaust temperature of the membrane wall is lowered, sticky blocking materials in the flue gas are bonded to the membrane wall section, a driver can drive a forklift into the membrane wall directly to clean away soot, blockage of the posterior bag-type dust remover is reduced, and replacement frequency of the bag-type dust remover is decreased.
Description
Technical field
The utility model relates to a kind of smoke processing system of rotary hearth furnace, belongs to metallurgy industry flue gas process field.
Background technology
In recent years, domestic steel industry development rapidly.Iron and steel is produced and has inevitably been produced the solid waste that contains in a large number the unacceptable harmful element composition of Ferrous Metallurgy, has strengthened iron content element resource and has reclaimed and environmental improvement difficulty.In dust, generally all contain the metal such as zinc, lead, adopt traditional sintering processing method can make zinc, plumbous enrichment, cause furnace nodulation, affect smooth operation of furnace and can damage smelting equipment.
By tackling key problems for many years, develop the technology of harmful element in coal-based rotary hearth furnace method recovery dust both at home and abroad.The element that contains iron and carbon in dust is carried out high temperature reduction by this technology, but zinc and otheralkali metal etc. in dust exist in flue gas, as carry out uncontrollable discharge and wet-treating flue gas can cause serious environmental pollution; As carried out in a organized way flue gas processing, the flue gas system that results in blockage, can not steady and continuous move rotary hearth furnace.Smoke processing system of rotary hearth furnace, substantially with reference to the rotary hearth furnace dust treating method of Nippon Steel, is mainly made up of heat exchanger, waste heat boiler, sack cleaner etc. both at home and abroad at present.Heat exchanger is used for preheated burning air, and waste heat boiler is to utilize waste heat recovery steam, and sack cleaner is for flue gas ash removal and reclaim secondary zinc oxide dust.
Though the method for the above-mentioned flue gas processing of rotary hearth furnace can meet the requirement of Mist heat recovering substantially, but also there is obvious defect, owing to containing zinc and other alkali metal component in flue gas, at the bottom of production process transfer, kiln gas system jams is serious, air heat exchanger, waste heat boiler, sack cleaner all can not be moved for a long time continuously, need the frequent cleaning tamper and change dust-collecting bag of stopping production, the efficiency of air heat exchanger is more and more lower, combustion air temperature also decreases, and affects the production of rotary hearth furnace.
Utility model content
The technical problems to be solved in the utility model is: propose a kind of smoke processing system that does not need frequent shutdown deashing and can make rotary hearth furnace system stable operation.
The utility model is that the technical scheme that solves the problems of the technologies described above proposition is: a kind of smoke processing system of rotary hearth furnace, comprise the expansion chamber, membrane wall, waste heat boiler and the sack cleaner that connect by flue successively, the gas approach of described expansion chamber is connected on rotary hearth furnace exhanst gas outlet, and the flue gas that described rotary hearth furnace is produced is by the flue discharge of the exhaust opening from described sack cleaner after described expansion chamber, membrane wall, waste heat boiler and sack cleaner dedusting successively.
Further, offer the cleaning door that enters deashing for forklift on the housing of described membrane wall, when described flue gas is discharged from described membrane wall outlet, temperature is lower than 500 ℃.
Further, also comprise air preheat stove, described air preheat stove and accessory has gas approach, air-in, hot-air delivery outlet and exhanst gas outlet, described hot-air delivery outlet is connected to the hot-air input port of described rotary hearth furnace, and the hot-air that described air preheat stove produces is used for supplying with rotary hearth furnace and uses.
Further, described expansion chamber, membrane wall, waste heat boiler and sack cleaner below are equipped with ash silo.
Further, the flue gas that described air preheat fire grate is emitted is used to the drying grate heat supply that is positioned at described system outside.
The beneficial effects of the utility model are:
Smoke processing system of rotary hearth furnace in the utility model is arranged on rotary hearth furnace flue gas system, the zinc better containing in recovered flue gas and other alkali metal component.Special in reducing the smoke temperature of membrane wall, make the sticky stifled thing in flue gas be bonded in membrane wall section, and can drive forklift and directly carry out deashing, reduce the obstruction to back segment dust-removal cloth-bag, delay the replacing time of dust-removal cloth-bag.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, smoke processing system of rotary hearth furnace in the utility model is described further.
Fig. 1 is the structure chart of smoke processing system of rotary hearth furnace;
Fig. 2 is the structural representation of air preheat stove.
The specific embodiment
Embodiment mono-
According to Fig. 1 and Fig. 2, the smoke processing system of rotary hearth furnace in the utility model, comprises the expansion chamber 1, membrane wall 2, waste heat boiler 3 and the sack cleaner 4 that connect by flue successively.
The gas approach of expansion chamber 1 is connected on rotary hearth furnace exhanst gas outlet.
The flue gas that rotary hearth furnace produces is by the flue discharge of the exhaust opening from sack cleaner 4 after expansion chamber 1, membrane wall, waste heat boiler 3 and sack cleaner 4 successively.
On the housing of membrane wall 2, offer for forklift and enter the cleaning door that carries out deashing, when flue gas is discharged from membrane wall 2 outlets, temperature is lower than 500 ℃.
The utility model middle setting chamber, membrane wall, waste heat boiler and sack cleaner below are equipped with ash silo 5.
Embodiment bis-
In the utility model, system also comprises air preheat stove, and air preheat stove and accessory has preheating furnace gas approach 6, air-in 7, hot-air delivery outlet 8 and preheating furnace exhanst gas outlet 9.
Flue gas enters preheating furnace from preheating furnace gas approach 6, by the hot flue gas in preheating furnace, cold air is heated up, and hot-air delivery outlet 8 is connected to the hot-air input port of rotary hearth furnace, the hot-air producing is supplied with to rotary hearth furnace and use.The flue gas that air preheat fire grate goes out is discharged from preheating furnace exhanst gas outlet 9, is used to the drying grate heat supply that is positioned at system outside.
The above-described embodiment that is not limited to of the present utility model, all employings are equal to replaces the technical scheme forming, and all drops in the protection domain of the utility model requirement.
Claims (5)
1. a smoke processing system of rotary hearth furnace, it is characterized in that: comprise the expansion chamber, membrane wall, waste heat boiler and the sack cleaner that connect by flue successively, the gas approach of described expansion chamber is connected on rotary hearth furnace exhanst gas outlet, and the flue gas that described rotary hearth furnace is produced is by the flue discharge of the exhaust opening from described sack cleaner after described expansion chamber, membrane wall, waste heat boiler and sack cleaner dedusting successively.
2. smoke processing system of rotary hearth furnace according to claim 1, is characterized in that: on the housing of described membrane wall, offer the cleaning door that enters deashing for forklift, when described flue gas is discharged from described membrane wall outlet, temperature is lower than 500 ℃.
3. smoke processing system of rotary hearth furnace according to claim 1, it is characterized in that: also comprise air preheat stove, described air preheat stove and accessory has gas approach, air-in, hot-air delivery outlet and exhanst gas outlet, described hot-air delivery outlet is connected to the hot-air input port of described rotary hearth furnace, and the hot-air that described air preheat stove produces is used for supplying with rotary hearth furnace and uses.
4. smoke processing system of rotary hearth furnace according to claim 1, is characterized in that: described expansion chamber, membrane wall, waste heat boiler and sack cleaner below are equipped with ash silo.
5. smoke processing system of rotary hearth furnace according to claim 3, is characterized in that: the flue gas that described air preheat fire grate is emitted is used to the drying grate heat supply that is positioned at described system outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320852652.9U CN203672157U (en) | 2013-12-23 | 2013-12-23 | Flue gas treatment system of rotary hearth furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320852652.9U CN203672157U (en) | 2013-12-23 | 2013-12-23 | Flue gas treatment system of rotary hearth furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203672157U true CN203672157U (en) | 2014-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320852652.9U Expired - Fee Related CN203672157U (en) | 2013-12-23 | 2013-12-23 | Flue gas treatment system of rotary hearth furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203672157U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106399619A (en) * | 2016-06-08 | 2017-02-15 | 江苏省冶金设计院有限公司 | High-temperature chain grate and rotary hearth furnace united direct reduction system and high-temperature chain grate and rotary hearth furnace united direct reduction method |
-
2013
- 2013-12-23 CN CN201320852652.9U patent/CN203672157U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106399619A (en) * | 2016-06-08 | 2017-02-15 | 江苏省冶金设计院有限公司 | High-temperature chain grate and rotary hearth furnace united direct reduction system and high-temperature chain grate and rotary hearth furnace united direct reduction method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Flue gas treatment system of rotary hearth furnace Effective date of registration: 20180328 Granted publication date: 20140625 Pledgee: Bank of Beijing, Limited by Share Ltd, Nanjing branch Pledgor: Jiangsu Research & Design Institute of Metallurgical Industry Co., Ltd. Registration number: 2018320000034 |
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| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20190102 Granted publication date: 20140625 |
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| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20220102 Granted publication date: 20140625 |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140625 Termination date: 20181223 |